Cryptanalysis of a universally verifiable efficient re-encryption mixnet

  • Authors:
  • Shahram Khazaei;Björn Terelius;Douglas Wikström

  • Affiliations:
  • Department of Mathematical Sciences, Sharif University of Technology, Tehran, Iran and KTH Royal Institute of Technology;KTH Royal Institute of Technology;KTH Royal Institute of Technology

  • Venue:
  • EVT/WOTE'12 Proceedings of the 2012 international conference on Electronic Voting Technology/Workshop on Trustworthy Elections
  • Year:
  • 2012

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Abstract

We study the heuristically secure mix-net proposed by Puiggalí and Guasch (EVOTE 2010). We present practical attacks on both correctness and privacy for some sets of parameters of the scheme. Although our attacks only allow us to replace a few inputs, or to break the privacy of a few voters, this shows that the scheme can not be proven secure.